/Engine/Source/Editor/MovieSceneTools/Public/Sections/ThumbnailSection.h
Callback for when the text of the track name text block has changed.
virtual void HandleThumbnailTextBlockTextCommitted ( const [FText](API\Runtime\Core\Internationalization\FText) & NewThumbnailName, [ETextCommit::Type](API\Runtime\SlateCore\Types\ETextCommit__Type) CommitType )